<template>
  <el-dialog v-model="dialogFormVisible" :before-close="handleClose" :close-on-click-modal="false" :title="title" width="909px">
    <div class="upload">
      <el-alert
        :closable="false"
        :title="`支持jpg、jpeg、png格式，单次可最多选择${limit}张图片，每张不可大于${size}M，如果大于${size}M会自动为您过滤`"
        type="info"
      />
      <el-upload
        ref="uploadRef"
        accept="image/png, image/jpeg"
        :action="action"
        :auto-upload="false"
        class="upload-content"
        :close-on-click-modal="false"
        :data="data"
        :file-list="fileList"
        :headers="headers"
        :limit="limit"
        list-type="picture-card"
        :multiple="true"
        :name="name"
        :on-change="handleChange"
        :on-error="handleError"
        :on-exceed="handleExceed"
        :on-preview="handlePreview"
        :on-progress="handleProgress"
        :on-remove="handleRemove"
        :on-success="handleSuccess"
      >
        <template #trigger>
          <vab-icon icon="add-line" />
        </template>
        <el-dialog v-model="dialogVisible" append-to-body title="查看大图">
          <div>
            <el-image :src="dialogImageUrl" />
          </div>
        </el-dialog>
      </el-upload>
    </div>
    <template #footer>
      <div v-if="show" style="position: absolute; top: 10px; left: 15px; color: #999999">
        正在上传中... 当前上传成功数:{{ imgSuccessNum }}张 当前上传失败数:{{ imgErrorNum }}张
      </div>
      <el-button type="primary" @click="handleClose">关闭</el-button>
      <el-button :loading="loading" style="margin-left: 10px" type="success" @click="submitUpload"> 开始上传 </el-button>
    </template>
  </el-dialog>
</template>

<script>
import { useUserStore } from "@/stores/modules/user";
import { storeToRefs } from "pinia";
import _ from "lodash";

export default defineComponent({
  name: "VabUpload",
  props: {
    url: {
      type: String,
      default: "/upload",
      required: true
    },
    name: {
      type: String,
      default: "file",
      required: true
    },
    limit: {
      type: Number,
      default: 50,
      required: true
    },
    size: {
      type: Number,
      default: 1,
      required: true
    }
  },
  setup(props) {
    const userStore = useUserStore();
    const { token } = storeToRefs(userStore);
    const $baseMessage = inject("$baseMessage");

    const state = reactive({
      uploadRef: null,
      show: false,
      loading: false,
      dialogVisible: false,
      dialogImageUrl: "",
      action: "",
      headers: {},
      fileList: [],
      picture: "picture",
      imgNum: 0,
      imgSuccessNum: 0,
      imgErrorNum: 0,
      typeList: null,
      title: "上传",
      dialogFormVisible: false,
      data: {}
    });

    const submitUpload = () => {
      state.uploadRef.submit();
    };
    const handleProgress = () => {
      state.loading = true;
      state.show = true;
    };
    const handleChange = (file, fileList) => {
      if (fileList && fileList.length > 0) {
        if (file.size > 1048576 * state.size) {
          fileList.filter(item => item !== file);
          state.fileList = fileList;
        } else {
          state.allImgNum = fileList.length;
        }
      }
    };
    const handleSuccess = (response, file, fileList) => {
      state.imgNum = state.imgNum + 1;
      state.imgSuccessNum = state.imgSuccessNum + 1;
      if (fileList.length === state.imgNum) {
        setTimeout(() => {
          $baseMessage(`上传完成! 共上传${fileList.length}张图片`, "success", "vab-hey-message-success");
        }, 1000);
      }

      setTimeout(() => {
        state.loading = false;
        state.show = false;
      }, 1000);
    };
    const handleError = (err, file) => {
      state.imgNum = state.imgNum + 1;
      state.imgErrorNum = state.imgErrorNum + 1;
      $baseMessage(
        `文件[${file.raw.name}]上传失败,文件大小为${_.round(file.raw.size / 1024, 0)}KB`,
        "error",
        "vab-hey-message-error"
      );
      setTimeout(() => {
        state.loading = false;
        state.show = false;
      }, 1000);
    };
    const handleRemove = () => {
      state.imgNum = state.imgNum - 1;
      state.allNum = state.allNum - 1;
    };
    const handlePreview = file => {
      state.dialogImageUrl = file.url;
      state.dialogVisible = true;
    };
    const handleExceed = files => {
      $baseMessage(
        `当前限制选择 ${state.limit} 个文件，本次选择了
                  ${files.length}
                  个文件`,
        "error",
        "vab-hey-message-error"
      );
    };
    const handleShow = data => {
      state.title = "上传";
      state.data = data;
      state.dialogFormVisible = true;
    };
    const handleClose = () => {
      state.fileList = [];
      state.picture = "picture";
      state.allImgNum = 0;
      state.imgNum = 0;
      state.imgSuccessNum = 0;
      state.imgErrorNum = 0;
      state.headers["Authorization"] = `Bearer ${token}`;
      state.dialogFormVisible = false;
    };

    onMounted(() => {
      state.headers["Authorization"] = `Bearer ${token}`;
      state.action = props.url;
    });

    const percentage = computed(() => {
      if (state.allImgNum === 0) return 0;
      return _.round(state.imgNum / state.allImgNum, 2) * 100;
    });

    return {
      ...toRefs(state),
      submitUpload,
      handleProgress,
      handleChange,
      handleSuccess,
      handleError,
      handleRemove,
      handlePreview,
      handleExceed,
      handleShow,
      handleClose,
      percentage
    };
  }
});
</script>

<style lang="scss" scoped>
.upload {
  height: 500px;
  .upload-content {
    .el-upload__tip {
      display: block;
      height: 30px;
      line-height: 30px;
    }
    :deep() {
      .el-upload--picture-card {
        width: 128px;
        height: 128px;
        margin: 3px 8px 8px;
        border: 2px dashed #c0ccda;
        .ri-add-line {
          font-size: 24px;
        }
      }
      .el-upload-list--picture {
        margin-bottom: 20px;
      }
      .el-upload-list--picture-card {
        .el-upload-list__item {
          width: 128px;
          height: 128px;
          margin: 3px 8px 8px;
        }
      }
    }
  }
}
</style>
